Windows [HELP] Sprite index isn't working

Hi i'm new to GameMaker and I don't understand why this code isn't working. I have sprites sPlayerPunchRight and sPlayerPunchLeft and an object oPlayer. In oPlayer there's a left pressed event that has this code in it.

Code:

// Punching
WhichPunch = random_range(1,2);

if (WhichPunch == 1) {
    sprite_index = sPlayerPunchRight;
}

if (WhichPunch == 2) {
    sprite_index = sPlayerPunchLeft;
}

When i click the left mouse button nothing happens.

 

@Pietuuh

since it gives you a decimal number, the "if" code is not executed.

you should use the choose function instead of the random range,

WhichPunch = choose(1,2);


and use randomize(); at the start of your game.

 

Or even simpler:

Code:

sprite_index = choose(sPlayerPunchLeft, sPlayerPunchRight);